.net中的Multipart/form-data和附加参数

本文关键字：参数 form-data 中的 Multipart net | 更新日期: 2023-09-27 18:06:06

在。net中创建post request的最佳方式是什么?我尝试使用HttpClient和multipartformdatcontent类，但到目前为止，我只能上传图像。我如何添加额外的参数，如api键?

  POST /services/upload/ HTTP/1.1
    Content-Type: multipart/form-data; boundary=---------------------------7d44e178b0434
    Host: api.flickr.com
    Content-Length: 35261
    -----------------------------7d44e178b0434
    Content-Disposition: form-data; name="api_key"
    3632623532453245
    -----------------------------7d44e178b0434
    Content-Disposition: form-data; name="auth_token"
    436436545
    -----------------------------7d44e178b0434
    Content-Disposition: form-data; name="api_sig"
    43732850932746573245
    -----------------------------7d44e178b0434
    Content-Disposition: form-data; name="photo"; filename="C:'test.jpg"
    Content-Type: image/jpeg
    {RAW JFIF DATA}
    -----------------------------7d44e178b0434--

.net中的Multipart/form-data和附加参数

类似…c# + .NET 4.0

Uri uri =  new Uri("api.flickr.com");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
//goes into the body. not header
NameValueCollection queryString = HttpUtility.ParseQueryString(string.Empty);
queryString["api_key"] = "7d44e178b0434";
...
object returnValue = null;
 try
            {
                using (var writer = new StreamWriter(request.GetRequestStream()))
                {
                    writer.WriteLine(queryString);
                }
                returnValue = request.GetResponse();
            }
            catch (Exception ex)
            {
               ..
            }

如果你想在页眉中添加一些内容-

 request.Headers.Add("HeaderKEY", somevalue);
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